A magnetic field-based micro-vibration measuring device and its measuring method
A measurement device and measurement method technology, applied in the field of magnetic field-based micro-vibration measurement and magnetic-field-based micro-vibration measurement device, can solve the problems of inability to meet high precision and low precision, and achieve easy analysis, high precision, and accurate signals. Effect
Active Publication Date: 2018-09-28
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology
Another thing is that the accuracy of the vibration measuring instrument of the existing technical level is on the low side
In the manufacturing industry, aerospace industry, and national defense military industry, there is an increasing need for precision and ultra-precision processing and measurement, so many existing technical levels cannot meet the needs of high-precision, high-stable platforms
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[0051] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0052] see figure 1 , figure 2 , an embodiment of the present invention provides a micro-vibration measurement device based on a magnetic field, comprising:
[0053] More than two fluxgate sensors 110 and a control processing circuit 200;
[0054] Each of the fluxgate sensors 110 is provided with corresponding excitation coils 111 and induction coils 112; the fluxgate principle is a magnetic field detection principle utilizing Faraday's law of electromagnetic induction combined with the characteristics of magnetically permeable materials. The basic working process of the fluxgate magnetometer in the present invention is to use the drive circuit to apply the excitation signal of alternating current to the excitation coil 111, and generate a magnetic field due to the change of the current. The magnetic fields inside the spiral ring ...
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The present invention proposes a magnetic field-based micro-vibration measurement device and its measurement method, which is applied to the technical field of micro-vibration measurement, including: more than two fluxgate sensors and control processing circuits, each of the fluxgate sensors There are corresponding excitation coils and induction coils; the control processing circuit includes: excitation signal generation module, frequency selection amplification module, phase-sensitive rectification module, smoothing filter module, environmental magnetic field acquisition module, vibration data statistics module excitation coil according to The excitation signal sent by the excitation signal generation module generates the excitation magnetic field signal; the induction coil is used to generate the induced current signal according to the received excitation magnetic field signal and the environmental magnetic field signal, and the induced current signal is sequentially amplified by frequency selection, rectified, and smoothed, and then calculated For environmental magnetic field data, compare and calculate two segments of environmental magnetic field data to obtain the micro-vibration angle; the signal measured by the present invention is accurate, has low noise, is easy to analyze, and has good data quality.
Description
technical field [0001] The invention relates to the technical field of micro-vibration measurement, in particular to a magnetic field-based micro-vibration measurement device and a magnetic field-based micro-vibration measurement method. Background technique [0002] In today's society, vibration measuring instruments have been widely used in all aspects of social production, which can be used to measure vibration velocity, acceleration and displacement values. Most of the vibration measuring instruments currently on the market are bearing structures, and the measured vibration signals include the vibration of the workpiece, so the vibration of the workpiece is the main source of noise. The vibration and noise of the bearing comprehensively reflect the dynamic performance and quality level of the bearing. What's more, the precision of the vibration measuring instrument of the prior art level is on the low side. In the manufacturing industry, aerospace industry, and nationa...
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IPC IPC(8): G01H11/02
CPCG01H11/02G01R33/0041G01R33/04G01D5/125G01R33/0029G01R33/0322
Inventor 孙树全杜爱民赵琳唐衡李琼冯晓李翠红底青云
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI